WRONG. A pre-order purchase is a contract. BA made a commitment to deliver on a specified date. If they cannot meet that date, their customers deserve the right to cancel that contract due to BA's failure to deliver. Especially in the US, it is the law.

Delivery Terms9.1 The Products are delivered to the delivery address specified by the Purchaser, unless otherwise agreed. The delivery date is provided for information purposes only and shall not be binding on Us. The Purchaser is not entitled to refuse acceptance of the Products, withdraw, cancel or revoke the order or make claims for compensation due to any delayed delivery. 9.2 Where delivery is delayed due to any of the circumstances constituting force majeure in accordance with "Force Majeure" below or due to any act or omission by the Purchaser, the delivery period shall be extended by such a period as is reasonable in light of the circumstances. The delivery period shall also be extended where the cause of the delay arises after the expiry of the originally agreed delivery period.9.3 If the delivery is prevented due to the Purchaser’s negligent acts or omissions, the risk for the Products shall pass to the Purchaser on the date when the Products were ready for delivery.